Ozonation of direct red-23 dye in a fixed bed batch bubble column reactor

Ozonation of Direct Red 23 dye in a fixed bed batch bubble column reactor is a new and innovative approach as it is one of the most advanced methods for decolorization of the textile of the textile effluents. Direct Red 23 dye is commonly used in textile industries. Ozone is a powerful oxidizing agent and can react with several classes of compounds through direct or indirect reactions. The Initial dye concentrations of 100mg/l, 121mg/l, 134.5mg/ 1,200mg/l are taken out for measuring the absorbencies (or concentrations) at different time intervals of 5, 10, 15, 20, 25, 30 and 35 minutes. The decolorization efficiency of ozonation of Direct Red 23 dye at different concentrations at simple bubble column and another a fixed bed bubble column were found to be 72, 97, 98 and 75. The degradation rate is higher for bubble column reactor with gravels or media and high mass transfer rate and high contact surface area help in dye degradation.